... the magnesium aluminum spinel, magnesium aluminum spinel sand , magnesium aluminum spinel powder, fused magnesium aluminum spinel,sintered magnesium aluminum spinel, with good quality ... spinel is chosed the high-quality bauxite and magnesia as the raw material ,through multilevel homogenization process ,and sintered ... ,ladle castable refractory material and so on . sintered magnesium aluminum spinel